pulseaudio strange behaviour

I have ubuntu 10.04 (AMD64), kernel 2.6.32-34.
In the last 15 days I found that Pulseaudio is not working as before. I have a TV card SAA7134, (since 3 years) that input the audio in line-in plug of the audio card. Suddenly has became mute, after surfing the web I found that I had to activate the loopback module, now is working. That is the first strange thing: suddenly loopback module has disappeared?
But now I have another problem: if I want to watch TV and listen it I have to select the line-in device in Pulseaudio preferences window, but in this way I can't use the mic with Skype and others chat software. To use the mic I have to go in the Pulseaudio preferences window and set the mic 1 option in the input device menu. Further, in this way I can constantly hear my voice in the speakers. That is annoying, Until 15 days ago (approx) ther was no need to make that choice, it was automatic.

Related bugs

Related FAQ:

nobody has an answer?
Nor in Pulseudio mailing list they have an answer! Is it possible?
Pulseaudio sholud be the best achievemnet for an easy use of the sound machine on a pc, it should easily mix all the sound flows (this says the Pulseaudio web page), but actually Pulseaudio can't do a simple mix of two channels. Alsamixer was perfectly doing that mix.
Is this a progress or a regression???

nobody has an answer?
Nor in Pulseudio mailing list they have an answer! Is it possible?
Pulseaudio sholud be the best achievemnet for an easy use of the sound machine on a pc, it should easily mix all the sound flows (this says the Pulseaudio web page), but actually Pulseaudio can't do a simple mix of two channels. Alsamixer was perfectly doing that mix.
Is this a progress or a regression???